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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

 Copyright (C) 2010 Klaus Spanderen

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at

 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.

/*! \file fdm2dblackscholesop.hpp

#ifndef quantlib_fdm_2d_black_scholes_op_hpp
#define quantlib_fdm_2d_black_scholes_op_hpp

#include <ql/experimental/finitedifferences/ninepointlinearop.hpp>
#include <ql/experimental/finitedifferences/fdmblackscholesop.hpp>
#include <ql/experimental/finitedifferences/fdmlinearopcomposite.hpp>

namespace QuantLib {

    class FdmMesher;
    class GeneralizedBlackScholesProcess;

00036     class Fdm2dBlackScholesOp : public FdmLinearOpComposite {
            const boost::shared_ptr<FdmMesher>& mesher,
            const boost::shared_ptr<GeneralizedBlackScholesProcess>& p1,
            const boost::shared_ptr<GeneralizedBlackScholesProcess>& p2,
            Real correlation,
            Time maturity,
            bool localVol = false,
            Real illegalLocalVolOverwrite = -Null<Real>());
        Size size() const;
        void setTime(Time t1, Time t2);    
        Disposable<Array> apply(const Array& x) const;
        Disposable<Array> apply_mixed(const Array& x) const;
        Disposable<Array> apply_direction(Size direction,const Array& x) const;
        Disposable<Array> solve_splitting(Size direction,
                                          const Array& x, Real s) const;
        Disposable<Array> preconditioner(const Array& r, Real s) const;
        const boost::shared_ptr<FdmMesher> mesher_;
        const boost::shared_ptr<GeneralizedBlackScholesProcess> p1_, p2_;
        const boost::shared_ptr<LocalVolTermStructure> localVol1_, localVol2_;
        const Array x_, y_;
        Real currentForwardRate_;
        FdmBlackScholesOp opX_, opY_;
        NinePointLinearOp corrMapT_;
        const NinePointLinearOp corrMapTemplate_;
        const Real illegalLocalVolOverwrite_;

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